Chiral susceptibility and the scalar Ward identity

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 暗物质和空间天文实验室

	Chiral susceptibility and the scalar Ward identity
	Chang, Lei 2; Liu, Yu-xin 3,4,5; Roberts, Craig D.1,6; Shi, Yuan-mei 7; Sun, Wei-min 7,8; Zong, Hong-shi 7,8
刊名	PHYSICAL REVIEW C
	2009-03-01
卷号	79 期号:3
英文摘要	The chiral susceptibility is given by the scalar vacuum polarization at zero total momentum. This follows directly from the expression for the vacuum quark condensate so long as a nonperturbative symmetry preserving truncation scheme is employed. For QCD in-vacuum the susceptibility can rigorously be defined via a Pauli-Villars regularization procedure. Owing to the scalar Ward identity, irrespective of the form or Ansatz for the kernel of the gap equation, the consistent scalar vertex at zero total momentum can automatically be obtained and hence the consistent susceptibility. This enables calculation of the chiral susceptibility for markedly different vertex Ansatze. For the two cases considered, the results were consistent and the minor quantitative differences easily understood. The susceptibility can be used to demarcate the domain of coupling strength within a theory upon which chiral symmetry is dynamically broken. Degenerate massless scalar and pseudoscalar bound-states appear at the critical coupling for dynamical chiral symmetry breaking.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Physics, Nuclear
研究领域[WOS]	Physics
关键词[WOS]	DYSON-SCHWINGER EQUATIONS ; QUARK BOUND-STATES ; QUANTUM CHROMODYNAMICS ; VACUUM SUSCEPTIBILITY ; SYMMETRY BREAKING ; DECAY CONSTANT ; MODEL ; QCD ; CONFINEMENT ; LATTICE
收录类别	SCI
语种	英语
WOS记录号	WOS:000264766100057
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/15909]
专题	紫金山天文台_暗物质和空间天文实验室
作者单位	1.Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA 2.Inst Appl Phys & Computat Math, Beijing 100094, Peoples R China 3.Peking Univ, Dept Phys, Beijing 100871, Peoples R China 4.Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China 5.Natl Lab Heavy Ion Accelerator, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China 6.Univ New S Wales, Sch Phys, Sydney, NSW 2052, Australia 7.Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China 8.Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210093, Peoples R China
推荐引用方式 GB/T 7714	Chang, Lei,Liu, Yu-xin,Roberts, Craig D.,et al. Chiral susceptibility and the scalar Ward identity[J]. PHYSICAL REVIEW C,2009,79(3).
APA	Chang, Lei,Liu, Yu-xin,Roberts, Craig D.,Shi, Yuan-mei,Sun, Wei-min,&Zong, Hong-shi.(2009).Chiral susceptibility and the scalar Ward identity.PHYSICAL REVIEW C,79(3).
MLA	Chang, Lei,et al."Chiral susceptibility and the scalar Ward identity".PHYSICAL REVIEW C 79.3(2009).